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结合扩频码分多址通信的基本原理 ,详细讨论了正交码和可变长度正交码及它们在CDMA中的作用以及多重扩频在 CDMA和 W- CDMA中实现的不同方法。
In combination with the basic principle of spread spectrum code division multiple access communication, orthogonal codes and variable length orthogonal codes are discussed in detail, and their roles in CDMA and different methods of multiple spreading in CDMA and W-CDMA are discussed.